/**
* Merge all `theme_config.*` options from main Hexo config into hexo.theme.config.
* This fixes an issue with hexo-renderer-stylus, which otherwise ignores these
* configuration overrides.
*/
hexo.on('generateBefore', function () {
  hexo.theme.config = Object.assign({}, hexo.theme.config, hexo.config.theme_config);
});
